Which of the following is primarily responsible for eventually stopping the spread of a virus within a host organism?

• A. Increased nutrient availability for the virus
• B. Continuous replication of viral particles
• C. Activation of the host's immune response
• D. Mutation of the host's DNA

Answer: (C)

Verified step by step guidance

1. Understand the context: When a virus infects a host organism, it begins to replicate and spread within the host's cells.
2. Consider the options: Increased nutrient availability and continuous replication of viral particles would actually promote viral spread, not stop it.
3. Recognize that mutation of the host's DNA is not a typical mechanism for stopping viral spread; mutations can sometimes affect susceptibility but are not a primary control method.
4. Focus on the host's immune response: The immune system detects viral components and activates defenses to eliminate infected cells and neutralize viral particles.
5. Conclude that the activation of the host's immune response is the primary factor responsible for eventually stopping the spread of a virus within a host organism.